CN217470331U - Non-stroboscopic high-power-factor linear constant-current LED lamp circuit - Google Patents
Non-stroboscopic high-power-factor linear constant-current LED lamp circuit Download PDFInfo
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- CN217470331U CN217470331U CN202220908553.7U CN202220908553U CN217470331U CN 217470331 U CN217470331 U CN 217470331U CN 202220908553 U CN202220908553 U CN 202220908553U CN 217470331 U CN217470331 U CN 217470331U
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Abstract
The utility model discloses a linear constant current LED lamp circuit of no stroboscopic high power factor, including rectifier circuit, the linear constant current circuit of multistage, two LED lighting circuit, two remove the stroboscopic circuit, one-way conduction circuit and constant current switch circuit, first LED lighting circuit, first remove the stroboscopic circuit, constant current switch circuit and rectifier circuit are connected, first LED lighting circuit and first remove the stroboscopic circuit and connect, first remove the stroboscopic circuit, one-way conduction circuit and two-stage length linear constant current circuit connection, one-way conduction circuit and constant current switch circuit connection, constant current switch circuit, second LED lighting circuit and second remove the stroboscopic circuit connection, second remove the stroboscopic circuit and two-stage length linear constant current circuit connection; the method has the advantages of low cost and high market competitiveness.
Description
Technical Field
The utility model relates to a linear constant current LED lamp circuit especially relates to a linear constant current LED lamp circuit of no stroboscopic high power factor.
Background
The high-power-factor linear constant-current LED lamp circuit generally adopts a multi-segment linear constant-current control technology, and each LED light-emitting circuit in the high-power-factor linear constant-current LED lamp circuit is driven to emit light through the multi-segment linear constant-current circuit, so that the requirements of light-emitting efficiency, input current harmonic waves and high-power-factor input are met. If the requirement of non-stroboscopic light emitting is to be realized, a stroboscopic removing circuit is required to be configured for each LED light emitting circuit in the high-power-factor linear constant-current LED lamp circuit.
As shown in fig. 1, the conventional non-strobe high-power-factor linear constant-current LED lamp circuit includes a multi-segment linear constant-current circuit having at least three output terminals, a rectifying circuit, 3 LED light-emitting circuits and 3 stroboscopic removing circuits, where the 3 LED light-emitting circuits are respectively referred to as a first LED light-emitting circuit, a second LED light-emitting circuit and a third LED light-emitting circuit, and the 3 stroboscopic removing circuits are respectively referred to as a first stroboscopic removing circuit, a second stroboscopic removing circuit and a third stroboscopic removing circuit. The multi-section linear constant current circuit is provided with a first output end, a second output end, a third output end and a negative electrode, the working voltage is connected through the first output end, when voltages with different magnitudes are connected between the first output end and the negative electrode of the multi-section linear constant current circuit, the maximum current value allowed to be output by the first output end, the second output end and the third output end correspondingly changes, the higher the voltage connected between the first output terminal and the negative electrode of the power supply, the larger the maximum current allowed to be output by the first output terminal, the second output terminal and the third output terminal of the power supply, when the current output by the second output end is larger than or equal to the current output by the first output end, the connection between the first output end and the negative pole is cut off, when the current output by the third output end is larger than or equal to the current output by the second output end, the first output end and the negative pole are in a cut-off state, and the second output end and the negative pole are in a cut-off state. The rectifying circuit is provided with a first input end, a second input end, a positive output end and a negative output end, and is used for converting alternating-current voltage connected between the first input end and the second input end into pulsating direct-current voltage with the same instantaneous absolute value as the alternating-current voltage and outputting the pulsating direct-current voltage between the positive output end and the negative output end. The first LED light-emitting circuit, the second LED light-emitting circuit and the third LED light-emitting circuit are all provided with a positive pole and a negative pole, and the light-emitting intensity of the first LED light-emitting circuit, the second LED light-emitting circuit and the third LED light-emitting circuit is in direct proportion to the current flowing between the positive pole and the negative pole. First stroboscopic circuit, second stroboscopic circuit and third stroboscopic circuit of going all have positive pole, negative pole and output, and first stroboscopic circuit, second stroboscopic circuit and third stroboscopic circuit of going store the electric energy through its anodal access current, discharge at its output with the direct current of invariable size according to the average value size of access current simultaneously. The anode of the first LED light-emitting circuit and the anode of the first stroboflash removing circuit are connected with the positive output end of the rectifying circuit, the cathode of the first LED light-emitting circuit is connected with the output end of the first stroboflash removing circuit, the cathode of the first stroboflash removing circuit and the anode of the second stroboflash removing circuit, the positive pole of second LED light emitting circuit and the first output of multistage linear constant current circuit are connected, the negative pole of second LED light emitting circuit and the output that the second removed stroboscopic circuit are connected, the negative pole of second removed stroboscopic circuit, the positive pole of third LED light emitting circuit, the positive pole of third removed stroboscopic circuit and the second output of multistage linear constant current circuit are connected, the negative pole of third LED light emitting circuit and the output that the third removed stroboscopic circuit are connected, the negative pole of third removed stroboscopic circuit and the third output of multistage linear constant current circuit are connected, the negative pole of multistage linear constant current circuit and the negative output of rectifier circuit are connected. When the mains voltage is connected between the first input end and the second input end of the rectifying circuit, the voltage between the positive pole and the negative pole of the first stroboscopic removing circuit is assumed to be V1, the voltage between the positive pole and the negative pole of the second stroboscopic removing circuit is assumed to be V2, the voltage between the positive pole and the negative pole of the third stroboscopic removing circuit is assumed to be V3, and the pulsating direct current voltage output between the positive output end and the negative output end of the rectifying circuit is recorded as Vo; when Vo is less than or equal to V1, voltages between the first output end, the second output end and the third output end of the multi-section linear constant current circuit and a negative electrode are all 0, no conduction current passes through, and the first stroboscopic removing circuit, the second stroboscopic removing circuit and the third stroboscopic removing circuit cannot be connected with the current to store electric energy; when Vo is greater than V1 and is less than or equal to V1+ V2, the voltage between the first output end and the negative electrode of the multi-stage linear constant current circuit is not 0, the first output end and the negative electrode of the multi-stage linear constant current circuit are conducted by current corresponding to the voltage, and the output current of the first output end of the multi-stage linear constant current circuit is used for providing electric energy for the first stroboscopic eliminating circuit; when Vo is larger than V1+ V2 and smaller than or equal to V1+ V2+ V3, the voltage between the first output end and the negative electrode of the multi-section linear constant current circuit is higher, the second output end and the negative electrode of the multi-section linear constant current circuit are conducted by current corresponding to the voltage, the first output end and the negative electrode of the multi-section linear constant current circuit are cut off, and the current output by the second output end of the multi-section linear constant current circuit provides electric energy for the first stroboscopic removing circuit and the second stroboscopic removing circuit at the same time; when Vo is larger than V1+ V2+ V3, the voltage between the first output end and the negative pole of the multi-section linear constant current circuit is further increased, the third output end and the negative pole of the multi-section linear constant current circuit are conducted by the current corresponding to the voltage, the first output end and the negative pole are cut off, the second output end and the negative pole are cut off, and the current output by the third output end of the multi-section linear constant current circuit provides electric energy for the first stroboscopic removing circuit, the second stroboscopic removing circuit and the third stroboscopic removing circuit. When Vo is periodically changed along with the mains supply voltage, the first stroboscopic removing circuit discharges and drives the first LED light-emitting circuit to emit light with constant current according to the average electric energy stored in the first stroboscopic removing circuit, the second stroboscopic removing circuit discharges and drives the second LED light-emitting circuit to emit light with constant current according to the average electric energy stored in the second stroboscopic removing circuit, and the third stroboscopic removing circuit discharges and drives the third LED light-emitting circuit to emit light with constant current according to the average electric energy stored in the third stroboscopic removing circuit.
In the non-stroboscopic high-power-factor linear constant-current LED lamp circuit, the maximum conduction current of the first output end is smaller than that of the second output end, the maximum conduction current of the second output end is smaller than that of the third output end, and the maximum currents allowed to be output by the first output end, the second output end and the third output end respectively change along with the voltage change between the first output end and the negative electrode of the first output end, so that the total current output by the first output end, the second output end and the third output end changes along with the voltage change between the first output end and the negative electrode of the third output end, the current accessed by the rectifying circuit correspondingly changes along with the sine wave change of the accessed mains supply alternating voltage, and the characteristic of low harmonic of a high-power factor is realized.
Above-mentioned linear constant current LED lamp circuit of no stroboscopic high power factor sets up a stroboscopic circuit respectively for each LED lighting circuit, makes each LED lighting circuit luminous with the current drive of mutually independent invariable size, keeps luminous not have the stroboscopic characteristic of light to have the luminous function of no stroboscopic. However, the stroboscopic removing circuit has high cost, so that the cost of the non-stroboscopic high-power-factor linear constant-current LED lamp circuit is high, and the market competitiveness is not high.
Disclosure of Invention
The utility model aims to solve the technical problem that a linear constant current LED lamp circuit of no stroboscopic high power factor that the cost is lower has higher market competition is provided.
The utility model provides a technical scheme that above-mentioned technical problem adopted does: a non-stroboscopic high-power-factor linear constant-current LED lamp circuit comprises a rectifying circuit, a multi-segment linear constant-current circuit, two LED light-emitting circuits and two stroboscopic removing circuits, wherein the two LED light-emitting circuits are called a first LED light-emitting circuit and a second LED light-emitting circuit, the two stroboscopic removing circuits are called a first stroboscopic removing circuit and a second stroboscopic removing circuit, the rectifying circuit is provided with a first input end, a second input end, a positive output end and a negative output end and is used for converting alternating-current voltage connected between the first input end and the second input end into pulsating direct-current voltage with the same instantaneous absolute value as the alternating-current voltage and outputting the pulsating direct-current voltage between the positive output end and the negative output end, the first LED light-emitting circuit and the second LED light-emitting circuit are respectively provided with a positive pole, a negative pole and an output end, the multi-section linear constant current circuit is a two-section linear constant current circuit, the two-section linear constant current circuit is provided with a first output end, a second output end and a negative electrode, the two-section linear constant current circuit is connected with working voltage from the first output end, when the first output end is connected with voltages with different magnitudes, the maximum current values allowed to be output by the first output end and the second output end correspondingly change, the higher the voltage connected to the first output end is, the larger the maximum current values allowed to be output by the first output end and the second output end is, and when the current output by the second output end is larger than or equal to the current output by the first output end, the connection between the first output end and the negative electrode is cut off, the magnitude of the output current is 0, the working voltage of the second LED light-emitting circuit is larger than the working voltage of the first LED light-emitting circuit, the stroboflash-free high-factor linear constant current LED lamp circuit also comprises a one-way conduction circuit and a constant current switch circuit, the unidirectional conduction circuit is provided with a positive pole and a negative pole, the conduction current direction of the unidirectional conduction circuit is from the positive pole to the negative pole, the constant current switch circuit is provided with a first end, a second end and a negative pole, the maximum conduction current between the first end and the negative pole is preset, the current between the second end and the negative pole can control the current between the first end and the negative pole, if the maximum conduction current between the first end and the negative pole of the constant current switch circuit is Io, the current between the first end and the negative pole is I1, and the current between the second end and the negative pole is I2, when I2 is smaller than Io, I1+ I2 is equal to Io, and when I2 is larger than or equal to Io, I1 is equal to 0; when the working voltage accessed by the two-segment linear constant current circuit from the first output end of the two-segment linear constant current circuit is equal to the voltage between the anode and the cathode of the second stroboscopic removing circuit, the maximum output current allowed to be output corresponding to the second output end of the two-segment linear constant current circuit is recorded as I, and the maximum conduction current Io between the first end and the cathode of the constant current switch circuit is set to be larger than or equal to I; the anode of the first LED light-emitting circuit, the anode of the first stroboscopic removing circuit and the first end of the constant current switch circuit are connected with the positive output end of the rectifying circuit, the cathode of the first LED light-emitting circuit is connected with the output end of the first stroboscopic removing circuit, the cathode of the first stroboscopic removing circuit and the anode of the one-way conduction circuit are connected with the first output end of the two-segment linear constant current circuit, the cathode of the one-way conduction circuit is connected with the second end of the constant current switch circuit, the cathode of the constant current switch circuit, the anode of the second LED light-emitting circuit are connected with the anode of the second stroboscopic removing circuit, the cathode of the second LED light-emitting circuit is connected with the output end of the second stroboscopic removing circuit, and the cathode of the second stroboscopic removing circuit is connected with the second output end of the two-segment linear constant current circuit, and the negative electrode of the two-section linear constant current circuit is connected with the negative output end of the rectifying circuit.
The two-section linear constant current circuit comprises a first integrated circuit, a first resistor, a second resistor and a first capacitor, the first integrated circuit is a high-voltage multi-section linear constant current LED control chip capable of meeting subharmonic requirements, the model of the first integrated circuit is BP5358H, a CS pin of the first integrated circuit is connected with one end of the first resistor, a VD pin of the first integrated circuit and one end of the second resistor are connected with one end of the first capacitor, the other end of the first resistor, the other end of the first capacitor and a GND pin of the first integrated circuit are connected, a connecting end of the first resistor and a connecting end of the first capacitor are the negative electrode of the two-section linear constant current circuit, the other end of the second resistor and a D1 pin of the first integrated circuit are connected, and a connecting end of the second resistor is a first output end of the two-section linear constant current circuit, and the pin D2 of the first integrated circuit is a second output end of the multi-section linear constant current circuit. The two-section linear constant current circuit utilizes the existing integrated circuit to quickly realize the functions required by the two-section linear constant current circuit.
Every remove the stroboscopic circuit include second integrated circuit, second electric capacity and first diode respectively, the second integrated circuit for the linearity remove the stroboscopic control chip, model JW1236X, the second electric capacity be electrolytic capacitor, first diode be rectifier diode, the positive pole of first electric capacity with the Vin foot of second integrated circuit connect and its link do remove the positive pole of stroboscopic circuit, the negative pole of first electric capacity, the GND foot of first integrated circuit with the positive pole of first diode connect, the negative pole of first diode be remove the negative pole of stroboscopic circuit, the VD foot of second integrated circuit be remove the output of stroboscopic circuit.
Compared with the prior art, the utility model has the advantages of through rectifier circuit, the linear constant current circuit of two-stage process, first LED luminescent circuit second LED luminescent circuit, first stroboscopic circuit that goes, the second removes the stroboscopic circuit, the linear constant current LED lamp circuit of no stroboscopic high power factor is constructed to one-way conduction circuit and constant current switch circuit, the biggest conduction current between the first end of supposing constant current switch circuit and the negative pole is Io, the current between first end and the negative pole is I1, the current between second end and the negative pole is I2, when I2 is less than Io then, I1+ I2 is Io, when I2 is more than or equal to Io, I1 is 0; when the working voltage accessed by the two-section linear constant current circuit from the first output end of the two-section linear constant current circuit is equal to the voltage between the anode and the cathode of the second stroboscopic removal circuit, the maximum output current allowed to be output corresponding to the second output end of the two-section linear constant current circuit is recorded as I, and the maximum conduction current Io between the first end and the cathode of the constant current switch circuit is set to be larger than or equal to I; when the first input end and the second input end of the rectifying circuit are connected with mains voltage, assuming that the voltage between the positive electrode and the negative electrode of the first stroboscopic removing circuit is V1, the voltage between the positive electrode and the negative electrode of the second stroboscopic removing circuit is V2, and V2 is greater than V1, and the pulsating direct current voltage output between the positive output end and the negative output end of the rectifying circuit is Vo, when Vo is less than or equal to V1, the voltages between the first output end and the second output end and the negative electrode of the two-segment linear constant current circuit are both 0, no conduction current passes through, at the moment, the first stroboscopic removing circuit and the second stroboscopic removing circuit cannot be charged, when Vo is greater than V1 and is less than or equal to V2, the voltage between the first output end and the negative electrode of the two-segment linear constant current circuit is not 0, the current corresponding to the voltage is conducted, and the current output by the first output end is used for charging the first stroboscopic removing circuit, when Vo is larger than V2 and is less than or equal to V1+ V2, the second output end and the negative electrode of the constant-current switch circuit are conducted, the first output end and the negative electrode are in a cut-off state, the conduction current between the second output end and the negative electrode of the second-stage linear constant-current circuit continuously increases along with the further increase of the voltage between the first output end and the negative electrode of the second-stage linear constant-current circuit, in the voltage interval, the second output end of the second-stage linear constant-current circuit outputs current with corresponding magnitude to charge the second stroboscopic removing circuit, when Vo is larger than V1+ V2, the voltage between the first output end and the negative electrode of the second-stage linear constant-current circuit continuously increases, the conduction current between the second output end and the negative electrode of the second-stage linear constant-current circuit is increased along with the increase of the conduction current, and the first output end and the negative electrode of the second-stage linear constant-current switch circuit are kept in the cut-off state; when the current output by the second output end of the two-section linear constant current circuit is less than the maximum conduction current between the first output end and the negative electrode of the constant current switch circuit, the first output end and the negative electrode of the constant current switch circuit are conducted, the unidirectional conduction circuit keeps reverse cut-off, the current output by the second output end of the multi-section linear constant current circuit charges the second stroboscopic circuit, when the current output by the second output end of the two-section linear constant current circuit is more than or equal to the maximum conduction current between the first output end and the negative electrode of the constant current switch circuit, the unidirectional conduction circuit is conducted in the forward direction, the first output end and the negative electrode of the constant current switch circuit are cut-off, the current output by the second output end of the multi-section linear constant current circuit simultaneously charges the first stroboscopic circuit and the second stroboscopic circuit, when Vo periodically changes along with mains supply voltage, the first stroboscopic circuit drives the first LED light-emitting circuit to emit light by discharging with the average electric quantity stored in the first stroboscopic circuit, the second removes the average electric quantity that stroboscopic circuit stored according to it and discharges drive second LED lighting circuit with the electric current of invariable size and give out light, from this the utility model discloses remove stroboscopic circuit and LED lighting circuit and increased one-way conduction circuit and constant current switch circuit and realize not having the linear constant current LED lamp circuit of stroboscopic high power factor with one less, the inside only need of multistage linear constant current circuit sets up two outputs, the inside partial circuit of reducible multistage linear constant current circuit, although one-way conduction circuit and constant current switch circuit have been increased, but the reduction cost that can be great on the whole, the cost is lower, has higher market competition.
Drawings
Fig. 1 is a schematic diagram of a conventional non-strobe high-power-factor linear constant-current LED lamp circuit;
fig. 2 is a schematic structural diagram of the non-strobe high-power-factor linear constant-current LED lamp circuit of the present invention;
fig. 3 is a circuit diagram of a multi-stage linear constant current circuit of the non-strobe high power factor linear constant current LED lamp circuit of the present invention;
fig. 4 is the circuit diagram of the stroboscopic removing circuit of the stroboscopic-free high power factor linear constant current LED lamp circuit of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the following embodiments.
Example (b): as shown in FIG. 2, a non-stroboscopic high power factor linear constant current LED lamp circuit comprises a rectifying circuit, a multi-segment linear constant current circuit, two LED light-emitting circuits and two stroboscopic removing circuits, wherein the two LED light-emitting circuits are called a first LED light-emitting circuit and a second LED light-emitting circuit, the two stroboscopic removing circuits are called a first stroboscopic removing circuit and a second stroboscopic removing circuit, the rectifying circuit is provided with a first input end, a second input end, a positive output end and a negative output end and is used for converting an alternating current voltage connected between the first input end and the second input end into a pulsating direct current voltage with the instantaneous absolute value equal to the alternating current voltage and outputting the pulsating direct current voltage between the positive output end and the negative output end, the first LED light-emitting circuit and the second LED light-emitting circuit are provided with a positive pole and a negative pole, the first stroboscopic removing circuit and the second stroboscopic removing circuit are provided with a positive pole, a negative pole and an output end, the multi-segment linear constant current circuit is a two-segment linear constant current circuit, the two-segment linear constant current circuit is provided with a first output end, a second output end and a negative electrode, the two-segment linear constant current circuit is connected with working voltage from the first output end, when the first output end is connected with voltages with different magnitudes, the maximum current values allowed to be output by the first output end and the second output end correspondingly change, the higher the voltage connected to the first output end is, the larger the maximum current values allowed to be output by the first output end and the second output end are, and when the current output by the second output end is more than or equal to the current output by the first output end, the connection between the first output end and the negative electrode is cut off, the output current is 0, the working voltage of the second LED light-emitting circuit is more than that of the first LED light-emitting circuit, the non-stroboflash high-power factor linear constant current LED lamp circuit also comprises a one-way conduction circuit and a constant current switch circuit, the one-way conduction circuit is provided with a positive electrode and a negative electrode, the constant current switch circuit is provided with a first end, a second end and a negative electrode, the maximum conducting current between the first end and the negative electrode is preset, the current between the second end and the negative electrode can control the current between the first end and the negative electrode, if the maximum conducting current between the first end and the negative electrode of the constant current switch circuit is Io, the current between the first end and the negative electrode is I1, and the current between the second end and the negative electrode is I2, when I2 is smaller than Io, I1+ I2 is Io, and when I2 is larger than or equal to Io, I1 is 0; when the working voltage accessed by the two-segment linear constant current circuit from the first output end of the two-segment linear constant current circuit is equal to the voltage between the anode and the cathode of the second stroboscopic removing circuit, the maximum output current allowed to be output corresponding to the second output end of the two-segment linear constant current circuit is recorded as I, and the maximum conduction current Io between the first end and the cathode of the constant current switch circuit is set to be larger than or equal to I; the positive pole of first LED lighting circuit, the positive pole of first stroboscopic circuit that removes, the first end of constant current switch circuit and the positive output of rectifier circuit are connected, the negative pole of first LED lighting circuit and the output of first stroboscopic circuit that removes are connected, the negative pole of first stroboscopic circuit that removes, the positive pole of one-way conduction circuit and the first output of two-stage length linear constant current circuit are connected, the negative pole of one-way conduction circuit and the second end of constant current switch circuit are connected, the negative pole of constant current switch circuit, the positive pole of second LED lighting circuit and the positive pole of second stroboscopic circuit that removes are connected, the negative pole of second LED lighting circuit and the output of second stroboscopic circuit that removes are connected, the negative pole of second stroboscopic circuit and the second output of two-stage length linear constant current circuit are connected.
As shown in fig. 3, in this embodiment, the two-stage linear constant current circuit includes a first integrated circuit U1, a first resistor R1, a second resistor R2, and a first capacitor C1, the first integrated circuit U1 is a high-voltage multi-stage linear constant current LED control chip capable of meeting subharmonic requirements, the first integrated circuit U1 has a model number of BP5358H, a CS pin of the first integrated circuit U1 is connected to one end of the first resistor R1, a VD pin of the first integrated circuit U1, one end of a second resistor R2 is connected with one end of a first capacitor C1, the other end of the first resistor R1 and the other end of the first capacitor C1 are connected with a GND pin of a first integrated circuit U1, the connection end of the first resistor R1 is the negative electrode of the two-section linear constant current circuit, the other end of the second resistor R2 is connected with a D1 pin of the first integrated circuit U1, the connection end of the second resistor R2 is the first output end of the two-section linear constant current circuit, and a D2 pin of the first integrated circuit U1 is the second output end of the multi-section linear constant current circuit.
As shown in fig. 4, in this embodiment, each stroboscopic removing circuit includes a second integrated circuit U2, a second capacitor C2 and a first diode D1, the second integrated circuit U2 is a linear stroboscopic removing control chip, model JW1236X, the second capacitor C2 is an electrolytic capacitor, the first diode D1 is a rectifier diode, the positive electrode of the first capacitor C1 is connected to the Vin pin of the second integrated circuit U2, the connection end of the first capacitor C1236 is the positive electrode of the stroboscopic removing circuit, the negative electrode of the first capacitor C1, the GND pin of the first integrated circuit U1 is connected to the positive electrode of the first diode D1, the negative electrode of the first diode D1 is the negative electrode of the stroboscopic removing circuit, and the VD pin of the second integrated circuit U2 is the output end of the stroboscopic removing circuit.
Claims (3)
1. A non-stroboscopic high-power-factor linear constant-current LED lamp circuit comprises a rectifying circuit, a multi-segment linear constant-current circuit, two LED light-emitting circuits and two stroboscopic removing circuits, wherein the two LED light-emitting circuits are called a first LED light-emitting circuit and a second LED light-emitting circuit, the two stroboscopic removing circuits are called a first stroboscopic removing circuit and a second stroboscopic removing circuit, the rectifying circuit is provided with a first input end, a second input end, a positive output end and a negative output end and is used for converting alternating-current voltage connected between the first input end and the second input end into pulsating direct-current voltage with the same instantaneous absolute value as the alternating-current voltage and outputting the pulsating direct-current voltage between the positive output end and the negative output end, the first LED light-emitting circuit and the second LED light-emitting circuit are respectively provided with a positive pole, a negative pole and an output end, the LED lamp circuit is characterized in that the multi-section linear constant current circuit is a two-section linear constant current circuit, the two-section linear constant current circuit is provided with a first output end, a second output end and a negative electrode, the two-section linear constant current circuit is connected with working voltage from the first output end, when the first output end is connected with voltages of different magnitudes, the maximum current values allowed to be output by the first output end and the second output end correspondingly change, the higher the voltage connected to the first output end is, the larger the maximum current values allowed to be output by the first output end and the second output end are, when the current output by the second output end is larger than or equal to the current output by the first output end, the connection between the first output end and the negative electrode is cut off, the magnitude of the output current is 0, the working voltage of the second LED light-emitting circuit is larger than the working voltage of the first LED light-emitting circuit, the non-stroboscopic-factor high-power linear constant current LED lamp circuit also comprises a one-way conduction circuit and a switch circuit, the unidirectional conduction circuit is provided with a positive pole and a negative pole, the conduction current direction of the unidirectional conduction circuit is from the positive pole to the negative pole, the constant current switch circuit is provided with a first end, a second end and a negative pole, the maximum conduction current between the first end and the negative pole is preset, the current between the second end and the negative pole can control the current between the first end and the negative pole, if the maximum conduction current between the first end and the negative pole of the constant current switch circuit is Io, the current between the first end and the negative pole is I1, and the current between the second end and the negative pole is I2, when I2 is smaller than Io, I1+ I2 is equal to Io, and when I2 is larger than or equal to Io, I1 is equal to 0; when the working voltage accessed by the two-segment linear constant current circuit from the first output end of the two-segment linear constant current circuit is equal to the voltage between the anode and the cathode of the second stroboscopic removing circuit, the maximum output current allowed to be output corresponding to the second output end of the two-segment linear constant current circuit is recorded as I, and the maximum conduction current Io between the first end and the cathode of the constant current switch circuit is set to be larger than or equal to I; the anode of the first LED light-emitting circuit, the anode of the first stroboscopic removing circuit and the first end of the constant current switch circuit are connected with the positive output end of the rectifying circuit, the cathode of the first LED light-emitting circuit is connected with the output end of the first stroboscopic removing circuit, the cathode of the first stroboscopic removing circuit and the anode of the one-way conduction circuit are connected with the first output end of the two-segment linear constant current circuit, the cathode of the one-way conduction circuit is connected with the second end of the constant current switch circuit, the cathode of the constant current switch circuit, the anode of the second LED light-emitting circuit are connected with the anode of the second stroboscopic removing circuit, the cathode of the second LED light-emitting circuit is connected with the output end of the second stroboscopic removing circuit, and the cathode of the second stroboscopic removing circuit is connected with the second output end of the two-segment linear constant current circuit, and the negative electrode of the two-section linear constant current circuit is connected with the negative output end of the rectifying circuit.
2. The non-stroboscopic high-power-factor linear constant-current LED lamp circuit as claimed in claim 1, wherein the two-stage linear constant-current circuit comprises a first integrated circuit, a first resistor, a second resistor and a first capacitor, the first integrated circuit is a high-voltage multi-stage linear constant-current LED control chip capable of meeting subharmonic requirements, the model of the first integrated circuit is BP5358H, the CS pin of the first integrated circuit is connected with one end of the first resistor, the VD pin of the first integrated circuit and one end of the second resistor are connected with one end of the first capacitor, the other end of the first resistor, the other end of the first capacitor and the GND pin of the first integrated circuit are connected, the connection end of the first integrated circuit is the negative electrode of the two-stage linear constant-current circuit, the other end of the second resistor and the D1 pin of the first integrated circuit are connected, and the connection end of the second integrated circuit is the second end of the two-stage linear constant-current circuit And the pin D2 of the first integrated circuit is a second output end of the multi-segment linear constant current circuit.
3. The non-stroboscopic high-power-factor linear constant-current LED lamp circuit as claimed in claim 2, wherein each stroboscopic removing circuit comprises a second integrated circuit, a second capacitor and a first diode, the second integrated circuit is a linear stroboscopic removing control chip, model JW1236X, the second capacitor is an electrolytic capacitor, the first diode is a rectifier diode, the positive electrode of the first capacitor is connected with the Vin pin of the second integrated circuit, the connection end of the first capacitor is the positive electrode of the stroboscopic removing circuit, the negative electrode of the first capacitor, the GND pin of the first integrated circuit and the positive electrode of the first diode are connected, the negative electrode of the first diode is the negative electrode of the stroboscopic removing circuit, and the VD pin of the second integrated circuit is the output end of the stroboscopic removing circuit.
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| CN202220908553.7U CN217470331U (en) | 2022-04-19 | 2022-04-19 | Non-stroboscopic high-power-factor linear constant-current LED lamp circuit |
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| CN202220908553.7U CN217470331U (en) | 2022-04-19 | 2022-04-19 | Non-stroboscopic high-power-factor linear constant-current LED lamp circuit |
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